public class CommandLine {
    public static void main(String[] args) {

        for(int i=0; i<args.length; i++){
            System.out.println("args[" + i + "]: " + args[i]);
        }
    }
}
/**
 * javac CommandLine.java
 * java CommandLine  (后面是具体的参数)  this is a command line 200 -100
 */
